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FAULT CODE 146

Engine Coolant Temperature - Data Valid But Above Normal Operating Range - Moderately Severe Level

Overview


CODE

REASON

EFFECT

Fault Code: 146

Engine Coolant Temperature - Data Valid But Above Normal Operating Range -

Progressive power derate

PID:

Moderately Severe Level. Engine coolant temperature signal indicates engine coolant

increasing in severity from time

SPN: 110

temperature is above engine protection warning limit.

of alert.

FMI: 0/16



LAMP: Amber



SRT:



Engine Coolant Temperature 1 Sensor Circuit


Circuit Description


The engine coolant temperature 1 sensor is used by the engine control module (ECM) to monitor the engine coolant temperature. The ECM monitors the voltage on the signal pin and converts this to a temperature value. The engine coolant temperature value is used by the ECM for the engine protection system and engine emissions control.


Component Location


The engine coolant temperature 1 sensor is located in the thermostat housing. Use the following procedure for a detailed component location view. Refer to

Procedure 100-002 in Section E.


Shop Talk


This fault code indicates that coolant temperature has exceeded the engine protection limits for high coolant temperature. Refer to Engine Coolant Temperature Above Normal symptom troubleshooting tree in the QSK19, QSK19 CM850 MCRS, and QSK19 CM2150 MCRS Service Manual, Bulletin 4021592.


Refer to Troubleshooting Fault Code t05-146.


Last Modified: 26-Nov-2012

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